*(.%
34
ACCEPTANCE TESTS
Immediately upon receipt of the relay,
an inspection and acceptance test
should be made to make sure that no
damage has been sustained in
shipment, and that the relay calibrations
have not been disturbed.
Visual Inspection
Check the nameplate stamping to make
sure that the model number and rating
of the relay agree with the requisition.
Remove the relay from its case and
check that there are no broken or
cracked molded parts or other signs of
physical damage, and that all screws
are tight.
Mechanical Inspection
1. The target and seal-in unit, pull and
lift the TOC lever to test the target, re-
peat the test for the IOC target. The
Target flag should remain when the
lever is released. Reset the target by
pushing the reset bar.
2. Make sure that the fingers and short-
ing bars agree with the internal connec-
tions diagram.
Caution
Every circuit in the drawout case has an
auxiliary brush. It is especially important
on current circuits and other circuits with
shorting bars that auxiliary brush be
bent high enough to engage
the connection plug or test plug before
the main brushes do. This will prevent
CT (current Transformer ) secondary
circuits from being opened.
Electrical Tests
DRAWOUT RELAYS, GENERAL
Since all drawout relays in service oper-
ate in their cases, it is recommended
that they be tested in their cases or an
equivalent case. A relay may be
tested without removing it from the
panel by using the appropriate test plug.
For a C case use XCA. test plug and for
a V or S case use the XLA series test
plug refer to GEs product catalog GEZ-
7723D section 12. Although the test
plugs provide greater flexibility, it re-
quires C.T. shorting jumpers and exer-
cise of greater care since connections
are made to both the relay and the ex-
ternal circuitry.
INVERSE TIME UNIT
Pickup Verification
-
Connect the relay as indicated in
Figure 23 or 24. In order to apply
current to the relay, use a 50/60
Hz voltage source, with a variable
resistor in series, or an electronic
current source.
-
Set the relay at the desired pickup
TOC and disable the
instantaneous unit by setting the
instantaneous current setting to
zero (0).
Apply current to the relay and verify that
the Pickup LED on the front of the relay
Summary of Contents for DIAC
Page 29: ...28 FIGURE 18 DIAC and DSFC External Internal Connections...
Page 30: ...29 FIGURE 19 DIFC External Internal Connections...
Page 31: ...30 FIGURE 20 DIAC Panel Mounting and Drilling...
Page 32: ...31 FIGURE 21 DIFC Panel Mounting and Drilling...
Page 33: ...32 FIGURE 21A SURFACE MOUNTING DIFC...
Page 34: ...33 FIGURE 22 DSFC Panel Mounting and Drilling...
Page 42: ...41 FIGURE 27 9819647 8919648 DIAC Front and Rear Views...
Page 43: ...42 FIGURE 28 8919652 8919653 DIFC Front and Rear Views...
Page 44: ...43 FIGURE 29 8919632 8919661 DSFC Front and Rear Views...
